Raw material that needed to be imported to the US included apex?

The term "apex" in the context of raw materials isn't commonly recognized, so it may refer to a specific product or industry jargon. However, the U.S. imports a variety of raw materials, including metals, minerals, and agricultural products. These imports are essential for various industries, including manufacturing, construction, and technology. If "apex" refers to a specific material or product, additional context would be needed for a more precise answer.